Improvement in pump-pistons



J. M. SPRINGER.

PUMP-PISTON.

Patented May 22,1877.

'U'U'ITNE SEES INUEINITDIH:

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" '1 I-JA'OOB amete, or INDIANAPOLIS, INDIANA. I

" "lM PRQVE ME NTi lNPUMP-PISTQNSI Specification forming part of LettersPatent 1 s dat edMay 22, 1877'; application filed I,

February 19, 1877.

To all whom it may concern Be it known that I, JACOB M. SPRINGER, of thecity of Indianapolis, county of Marion, and State of Indiana, haveinvented certain new and useful Improvements in Pump-Suckers, of whichthe following is a specification:

Reference is had to the accompanying drawings, which are made a parthereof, and in which similar letters of reference on the differentfigures indicate similar parts.

Figure 1 is a perspective view of my invention. Fig. 2 is a plansectional view thereof. Fig. 3 is a view of the edge of a piece ofleather or other material for packing, on which the dotted bevel linesshow how it is cut into strips for use. Fig. 4 is a perspective view ofthe valve 0.

My present invention is an improvement on that for which Letters PatentNo. 160,065 were granted me, dated February 23, 1875.

The object of my invention is to produce a cheap and durable, and at thesame time superior, sucker for the various kinds of pumps.

In my patent above referred to, a short tube or cylinder, 0, having abevel valve-seat, c, was made a part of the invention, and also anannular shoulder, b.

In my present improvement the valve-seat is formed in the main cylinderof the sucker, entirely dispensing with the tube or cylinder 0, andinstead of using the annular shoulder b for a stop for the valve, thelower end of the connecting-rod F is made to perform that duty.

In order to show the manner in which the cylinder (J is dispensed within my improvement, it is necessary to describe the process ofmanufacture of the main cylinder A. A block of the proper size is firstinserted in a machine, which shapes the outside complete, as shown, andat the same time bores a hole the size necessary to receive the rod Fentirely through the sucker, all at one operation; and secondly, bypushing the lower end of the cylinder so formed upon an expansion bit,which first bores a hole of the required'size to the top of the chamberE, and then expands to a larger size, and is brought back to the pointwhere it is desired to form the valve-seat, when the expansion isdropped and the bit withdrawn, leaving the sucker ready for the placingof the valve G, which is inserted through the opening B. The rod F isthen placed in position and secured, usually by the pin a, and afterattaching the packing, which is done either before or after putting inthe valve and rod, the sucker is complete and ready for use.

The valve 0 is usually made of iron, but any other suitable metal ormaterial maybe used.

' The method employed by me in cutting the material for the packing Dforms an important part of my invention. Such material (leather beingthe material most commonly used) has heretofore been cut in the form ofan arc of a circle, and from'one to two inches wide. I cut the materialon a bevel, with a width of about five-eighths of an inch, and on astraight line, saving thereby from onehalf to three-fourths of thematerial.

By referring to Fig.3, which represents the edge of a sheet of leather,or other material, it will be seen that cuts, which are represented bydotted bevel lines, make no waste whatever, the front edge of one cut orstrip immediately adjoining the back edge of the next.

My packing, when so cut, is also much more durable than the ordinarypacking, as I nail one cut edge next the cylinder, which leaves theother as a wearing-surface, instead of the side, which wears much morerapidly than the'edge.

A still further saving by this mode of cutting, when leather is used, isthat the whole side may be used irrespective of its varying thickness,as the cutting being done by gage, and the out edges being theworking-surfaces, the thickness of the material is of no consequence.

The cylinder A, as usually made, has the two recesses b and 0 turnedtherein, the recess 0 being for the purpose of better supporting thepacking D, and the recessb allowing it to freely contract when passingany irregularity in the barrel of the pump.

The whole expense of manufacture of this improved sucker is only aboutone-third that of the old style, while it is in every way superior, aswill be readily shown on trial, and will last fully three times as longwithout repairs, by reason of the wear coming on the cut-edge of thepacking, as described, and the out of repair at all.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is v 1. The packing D, consisting of a stripof suitable material cut with beveled edges, as shown and for thepurpose specified.

2. The combination of the cylinder A, having recesses b and 0, packingD, independent valve 0, and rod F, all as herein shownand described, andas'and for the purpose specified. 1

3. The rod F, in combinationwith a pump- J sucker, as shown, used as astop for the valve 0, as herein shown and described.

In witness whereof I have hereunto set my hand at Indianapolis, Indiana,this 15th day of February, A. D. 1877.

JACOB M. SPRINGER. v In presence of- G. BRADFORD,

CYRUS N. .WA Ls.

